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Posted to java-user@lucene.apache.org by Terence Lai <tl...@trekspace.com> on 2005/07/07 21:04:51 UTC
Help on the ParallelMultiSearcher.rewrite(Query) method
Hi all,
I am currently using Lucene 1.4.2. Since my search documents are huge, I divide the search index into different index directory and make use of the ParallelMultiSearcher to perform the search.
Currently, I am working on the highlight feature using Lucene Sandbox Highlighter. One of the requirements is to convert the Query into the primitive form. I invoked the ParallelMultiSearcher.rewrite(Query). However, I got the exception, UnsupportedOperationException.
I start studying the source code. I discover that the ParallelMultiSearcher calls Query.combine() method to combine multiple primitive query into a single one. By looking at the Query.java, the method hasn't been implemented as you see below:
/** Expert: called when re-writing queries under MultiSearcher.
*
* <p>Only implemented by derived queries, with no
* {@link #createWeight(Searcher)} implementatation.
*/
public Query combine(Query[] queries) {
throw new UnsupportedOperationException();
}
Does anyone know any alternative to rewrite the query if I have multiple index directories?
Thanks,
Terence
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Re: Help on the ParallelMultiSearcher.rewrite(Query) method
Posted by Erik Hatcher <er...@ehatchersolutions.com>.
Terence - you need to do the rewrite using the appropriate
IndexReader for a single index. You can use query.rewrite(IndexReader).
Erik
On Jul 7, 2005, at 3:04 PM, Terence Lai wrote:
> Hi all,
>
> I am currently using Lucene 1.4.2. Since my search documents are
> huge, I divide the search index into different index directory and
> make use of the ParallelMultiSearcher to perform the search.
>
> Currently, I am working on the highlight feature using Lucene
> Sandbox Highlighter. One of the requirements is to convert the
> Query into the primitive form. I invoked the
> ParallelMultiSearcher.rewrite(Query). However, I got the exception,
> UnsupportedOperationException.
>
> I start studying the source code. I discover that the
> ParallelMultiSearcher calls Query.combine() method to combine
> multiple primitive query into a single one. By looking at the
> Query.java, the method hasn't been implemented as you see below:
>
> /** Expert: called when re-writing queries under MultiSearcher.
> *
> * <p>Only implemented by derived queries, with no
> * {@link #createWeight(Searcher)} implementatation.
> */
> public Query combine(Query[] queries) {
> throw new UnsupportedOperationException();
> }
>
> Does anyone know any alternative to rewrite the query if I have
> multiple index directories?
>
> Thanks,
> Terence
>
>
>
>
> ----------------------------------------------------------
> Get your free email account from http://www.trekspace.com
> Your Internet Virtual Desktop!
>
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